80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
#ifndef JSON_PARSER_PREFIXING_CALLBACKS_HPP
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#define JSON_PARSER_PREFIXING_CALLBACKS_HPP
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#include <boost/property_tree/json_parser/detail/standard_callbacks.hpp>
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namespace constants
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{
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template <typename Ch> const Ch* null_prefix();
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template <> inline const char* null_prefix() { return "_:"; }
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template <> inline const wchar_t* null_prefix() { return L"_:"; }
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template <typename Ch> const Ch* boolean_prefix();
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template <> inline const char* boolean_prefix() { return "b:"; }
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template <> inline const wchar_t* boolean_prefix() { return L"b:"; }
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template <typename Ch> const Ch* number_prefix();
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template <> inline const char* number_prefix() { return "n:"; }
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template <> inline const wchar_t* number_prefix() { return L"n:"; }
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template <typename Ch> const Ch* string_prefix();
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template <> inline const char* string_prefix() { return "s:"; }
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template <> inline const wchar_t* string_prefix() { return L"s:"; }
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template <typename Ch> const Ch* array_prefix();
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template <> inline const char* array_prefix() { return "a:"; }
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template <> inline const wchar_t* array_prefix() { return L"a:"; }
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template <typename Ch> const Ch* object_prefix();
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template <> inline const char* object_prefix() { return "o:"; }
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template <> inline const wchar_t* object_prefix() { return L"o:"; }
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}
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template <typename Ptree>
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struct prefixing_callbacks
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: boost::property_tree::json_parser::detail::standard_callbacks<Ptree> {
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typedef boost::property_tree::json_parser::detail::standard_callbacks<Ptree>
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base;
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typedef typename base::string string;
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typedef typename base::char_type char_type;
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void on_null() {
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base::on_null();
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this->current_value().insert(0, constants::null_prefix<char_type>());
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}
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void on_boolean(bool b) {
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base::on_boolean(b);
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this->current_value().insert(0, constants::boolean_prefix<char_type>());
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}
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template <typename Range>
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void on_number(Range code_units) {
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base::on_number(code_units);
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this->current_value().insert(0, constants::number_prefix<char_type>());
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}
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void on_begin_number() {
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base::on_begin_number();
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this->current_value() = constants::number_prefix<char_type>();
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}
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void on_begin_string() {
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base::on_begin_string();
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if (!this->is_key()) {
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this->current_value() = constants::string_prefix<char_type>();
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}
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}
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void on_begin_array() {
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base::on_begin_array();
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this->current_value() = constants::array_prefix<char_type>();
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}
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void on_begin_object() {
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base::on_begin_object();
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this->current_value() = constants::object_prefix<char_type>();
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}
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};
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#endif
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